Shift of Chemical Equilibria and Transformation Laws in 12-Salt Six-Component Reciprocal Systems in Melt

摘要

Ten six-component 12-salt systems of various types were studied: Na,K,Ca,Ba||F,SO_4,WO_4 (type 2ABD); Na,K,Ca||F,Cl,SO_4,WO_4 (type AC2D); Na,K,Ca,Ba||Cl,SO_4,WO_4 (type 4A); Na,K,Ca,Ba||F,Cl,WO_4 (type AC2D); Li,Na,K||Cl,Br,NO_3,SO_4 (type ABCC); Na,K,Ca,Ba||F,Cl,SO_4 (type ABCC); K,Ca,Ba||F,Q,SO_4,WO_4 (type ABCC); Na,K,BallF,Cl,SO_4,WO_4 (type 3AD); Na,Ca,Ba||F,Cl,SO_4,WO_4 (type 3AB); and Na,Ca,BallF,Cl,SO_4,MoO_4 (type 3BC). Laws governing the shift of exchange chemical equilibrium in these systems were determined for first time. Two groups of 12-salt systems were recognized. These groups differ in the number of the most stable salts, which have the highest indices in the matrix of vertex indices, and in the topology of their basal tetrahedra (the major elements of the singular star), which are either symmetrical or asymmetrical druses. The transformation of exchange reaction stages in going from nine-salt systems to a 12-salt system was determined. In this way, we revealed a correlation between the shift of exchange chemical equilibrium and the topology of the geometric model of a 12-salt reciprocal system, as well as with the thermo-chemical relations in this system and in the nine-salt five-component reciprocal subsystems. AH models completely correlate with each other and with Kurnakov's principle.